/**
* @test
*/
public function shouldSortArrayByCompoundComparator()
{
//given
$product1 = new Product(array('name' => 'b', 'description' => '2'));
$product2 = new Product(array('name' => 'a', 'description' => '1'));
$product3 = new Product(array('name' => 'a', 'description' => '2'));
$array = array($product3, $product1, $product2);
$comparator = Comparator::compound(Comparator::reverse(Comparator::compareBy('name')), Comparator::compareBy('description'));
//when
$sorted = Arrays::sort($array, $comparator);
//then
Assert::thatArray($sorted)->containsExactly($product1, $product2, $product3);
}
/**
* @test
*/
public function shouldNotUseFinalTieBreakerWhenAnyPriorResolves()
{
//given
$alwaysLess = Functions::constant(-1);
$alwaysGreater = Functions::constant(1);
$alwaysEqual = Functions::constant(0);
$greaterComparator = Comparator::compound($alwaysEqual, $alwaysGreater, $alwaysLess);
$lesserComparator1 = Comparator::compound($alwaysEqual, $alwaysLess, $alwaysGreater);
$lesserComparator2 = Comparator::compound($alwaysLess, $alwaysEqual, $alwaysEqual);
//when
$greater = $greaterComparator(null, null);
$lesser1 = $lesserComparator1(null, null);
$lesser2 = $lesserComparator2(null, null);
//then
$this->assertEquals(-1, $lesser1);
$this->assertEquals(1, $greater);
$this->assertEquals(-1, $lesser2);
}
